Set-top box

Set-top box

Choosing the Right Box

Published in Lars-Ingemar Lundström, Understanding Digital Television, 2012

In this book, I have described how different kinds of digital TV work. There are four different kinds of set-top boxes: satellite, cable, terrestrial and IPTV. In addition, computers can be used for receiving TV, primarily via the Internet.

The Changing Face of Public Broadcasting in India

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Journal Information

Published in IETE Journal of Education, 2023

R. N. Misra

The digital satellite TV signal is beamed towards the target area on the Earth, by means of a directional antenna, of the geostationary satellite. The carrier frequencies are in the 10–14 GHz range, and a small parabolic rooftop dish antenna, of 600 mm diameter, is used for receiving the signals (Figure 3). The information is modulated on the carrier using single carrier quadrature phase shift keying (QPSK). A low noise block (LNB), containing antenna feed and low noise mixer, down converts the incoming Ku band signal to an intermediate frequency (IF) in the 950–2150 MHz range. This IF signal connects to the user set top box (STB), by means of a low loss coaxial cable. The STB contains the tuner and IF sections to convert the incoming signal to a lower IF, as well as demodulators/decoders. The IF signal is amplified and demodulated to recover the digital bit stream. The service providers supply proprietary STB, along with subscription control and decoding software.

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Choosing the Right Box

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